| /* asm.h -- macros for m68k asm |
| * |
| * Copyright (c) 1995, 1996 Cygnus Support |
| * |
| * The authors hereby grant permission to use, copy, modify, distribute, |
| * and license this software and its documentation for any purpose, provided |
| * that existing copyright notices are retained in all copies and that this |
| * notice is included verbatim in any distributions. No written agreement, |
| * license, or royalty fee is required for any of the authorized uses. |
| * Modifications to this software may be copyrighted by their authors |
| * and need not follow the licensing terms described here, provided that |
| * the new terms are clearly indicated on the first page of each file where |
| * they apply. |
| */ |
| |
| #if 0 |
| /* |
| * XXX __USER_LABEL_PREFIX__ and __REGISTER_PREFIX__ do not work on gcc 2.7.0-3 |
| * XXX The following ifdef magic fixes the problem but results in a warning |
| * XXX when compiling assembly code. |
| */ |
| #ifndef __USER_LABEL_PREFIX__ |
| /* #define __USER_LABEL_PREFIX__ "" /* no underscore for coff */ |
| #define __USER_LABEL_PREFIX__ _ /* leading underscore for aout */ |
| #endif |
| |
| #ifndef __REGISTER_PREFIX__ |
| #define __REGISTER_PREFIX__ /* never has anything prefixed */ |
| #endif |
| #endif |
| |
| /* |
| * some assemblers choke on '#' as an immediate value. As gcc can also |
| * use '&', use that in those cases. |
| */ |
| #ifndef __IMMEDIATE_PREFIX__ |
| #define __IMMEDIATE_PREFIX__ # |
| #endif |
| |
| /* ANSI concatenation macros. */ |
| #define CONCAT1(a, b) CONCAT2(a, b) |
| #define CONCAT2(a, b) a ## b |
| |
| /* use the right prefix for global labels. */ |
| #define SYM(x) CONCAT1 (__USER_LABEL_PREFIX__,x) |
| |
| /* use the right prefix for registers. */ |
| #define REG(x) CONCAT1 (__REGISTER_PREFIX__,x) |
| |
| /* use the right prefix for immediate values. */ |
| #define IMM(x) CONCAT1 (__IMMEDIATE_PREFIX__,x) |
| |
| /* use the right prefix for register names */ |
| #define d0 REG (d0) |
| #define d1 REG (d1) |
| #define d2 REG (d2) |
| #define d3 REG (d3) |
| #define d4 REG (d4) |
| #define d5 REG (d5) |
| #define d6 REG (d6) |
| #define d7 REG (d7) |
| #define a0 REG (a0) |
| #define a1 REG (a1) |
| #define a2 REG (a2) |
| #define a3 REG (a3) |
| #define a4 REG (a4) |
| #define a5 REG (a5) |
| #define a6 REG (a6) |
| #define a7 REG (a7) |
| #define fp REG (fp) |
| #define fp0 REG (fp0) |
| #define fp1 REG (fp1) |
| #define fp2 REG (fp2) |
| #define fp3 REG (fp3) |
| #define fp4 REG (fp4) |
| #define fp5 REG (fp5) |
| #define fp6 REG (fp6) |
| #define fp7 REG (fp7) |
| #define sp REG (sp) |
| #define usp REG (usp) |
| #define vbr REG (vbr) |
| #define mbb REG (mbb) |
| #define sr REG (sr) |
| #define fpcr REG (fpcr) |
| #define fpsr REG (fpsr) |
| #define fpi REG (fpi) |
| |
| /* Provide a few macros to allow for PIC code support. |
| * With PIC, data is stored A5 relative so we've got to take a bit of special |
| * care to ensure that all loads of global data is via A5. PIC also requires |
| * jumps and subroutine calls to be PC relative rather than absolute. We cheat |
| * a little on this and in the PIC case, we use short offset branches and |
| * hope that the final object code is within range (which it should be). |
| */ |
| #ifndef __PIC__ |
| |
| /* Non PIC (absolute/relocatable) versions */ |
| |
| .macro PICCALL addr |
| jbsr \addr |
| .endm |
| |
| .macro PICJUMP addr |
| jmp \addr |
| .endm |
| |
| .macro PICLEA sym, reg |
| lea \sym, \reg |
| .endm |
| |
| .macro PICPEA sym, areg |
| pea \sym |
| .endm |
| |
| #else /* __PIC__ */ |
| |
| /* Common for -mid-shared-libary and -msep-data */ |
| |
| .macro PICCALL addr |
| bsr \addr |
| .endm |
| |
| .macro PICJUMP addr |
| bra \addr |
| .endm |
| |
| # if defined(__ID_SHARED_LIBRARY__) |
| |
| /* -mid-shared-library versions */ |
| |
| .macro PICLEA sym, reg |
| movel a5@(_current_shared_library_a5_offset_), \reg |
| movel \sym@GOT(\reg), \reg |
| .endm |
| |
| .macro PICPEA sym, areg |
| movel a5@(_current_shared_library_a5_offset_), \areg |
| movel \sym@GOT(\areg), sp@- |
| .endm |
| |
| # else /* !__ID_SHARED_LIBRARY__ */ |
| |
| /* Versions for -msep-data */ |
| |
| .macro PICLEA sym, reg |
| movel \sym@GOT(a5), \reg |
| .endm |
| |
| .macro PICPEA sym, areg |
| movel \sym@GOT(a5), sp@- |
| .endm |
| |
| # endif /* !__ID_SHARED_LIBRARY__ */ |
| #endif /* __PIC__ */ |
| |
